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I Question about lifting water through a water pipe

  1. Mar 13, 2018 #1
    First post, hope you all can help me out. I’m a peace corps volunteer in Nepal and am trying to implement drip irrigation for my school garden, since this season, we get water for about 30 minutes in the morning through a tap that is “always open.” The water that comes has some pressure, or else I’d have given up a while back since the water must be lifted to the top of the plastic.. (jeeze, I forgot the name in English...)... to the top of the plastic... TANK. There it is. Batta in Nepali. (May be forgetting English but at least I am using metric...)
    However- to my dismay, the required lift is too high for the water pressure(flow? What is correct to say there?) coming from the tap this time of year.

    1. Here is my thought- Bernoulli’s principle states that in a horizontal pipe, as water velocity increases, pressure decreases. (Right? I want study to be an ecological engineer after service- better have that right!)
    But what about in a vertical pipe? I mean, if when the pipe is vertical in my system, I switch it out with a smaller pipe(using the oddest looking connector pieces available in my bazaar), would the water be able to be lifted higher? The velocity wouldn’t increase but the diameter of the pipe would decrease.. At the expense of the flow, I assumed it would- and don’t mind the loss of water per time unit- to a degree. Is this worth a try? Or should I revert to lowering the tank in spite of wanting as much PE as possible for the drip irrigation system.

    I’ve decided to take this garden and within it talk about the science of gardening and ag tools like drip irrigation and plastic tunnels. These kids are so darn smart! Easily understanding potential energy(why should we raise the tank?), etc. I actually sent some of their questions to the ISS to be answered by a returned PCV who is working up there. It was a fun project.. received a video of two astronauts from Peace Corps! Anyway, if you could help me out here- I would greatly appreciate it. Plus you’d be apart of my service.. that’s kind of special! If I can manage to get this photo uploaded, you might be able to see why I’m looking for DI. Ironically, this project took a few months extra time to get the materials, after about a month it will be monsoon season- and we will be burdened with too much water in Nepal. HA. Life is beautiful.

    2. If a pipe’s height first decreases 3m, then rises 4m- would the output be the same as it just increasing 1m through a pipe of the same size? If at the lowest point I use a smaller pipe as I rises- how light that affect the output? Flow and velocity would certainly be restricted, does that mean pressure would increase?

    Thank you so much and I hope to hear some ideas ASAP!
  2. jcsd
  3. Mar 13, 2018 #2
    I can’t figure out how to edit the thread title, sorry. Defiently no waterbeds here..
  4. Mar 14, 2018 #3


    Staff: Mentor

    I used magic moderator powers to edit it.
  5. Mar 14, 2018 #4
    Thanks! I accidently posted this twice, too, again in the engineering section. Internet can be funny here. I’m becoming somewhat of a “batmaas.” (That’s nincompoop in Nepali). My apologies.
  6. Mar 14, 2018 #5


    Staff: Mentor

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